Prepare for the EPA 609 - EPA Section 609 Refrigerant Certification exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
Try these questions from our free EPA 609 - EPA Section 609 Refrigerant Certification practice tests. The correct answer and an explanation follow each question.
What is the difference between 'recovery' and 'recycling' of refrigerant?
Answer: B. Recovery removes refrigerant from the system; recycling cleans it on-site for reuse
Recovery transfers refrigerant from the vehicle to a container, while recycling additionally passes it through filters and driers to remove contaminants for reuse.
What hazardous gas can form when refrigerant contacts an open flame or very hot surface?
Answer: B. Phosgene or hydrofluoric acid gas
When refrigerants decompose in flames, they can produce phosgene (from CFCs) or hydrofluoric acid (from HFCs), both of which are extremely toxic.
Service hoses used for R-1234yf systems are different from R-134a hoses in that they:
Answer: B. Use unique quick-disconnect fittings to prevent cross-contamination between refrigerant types
R-1234yf service fittings are intentionally incompatible with R-134a equipment to prevent dangerous or illegal refrigerant mixing.
The high-pressure side of an MVAC system runs between which components?
Answer: B. Compressor outlet to evaporator inlet (through condenser)
The high-pressure side runs from the compressor outlet through the condenser and to the metering device inlet.
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